Re: Wood effect

[Jesko-Henning Tanke <jesko-henning@xxxxxxxxxxx>]

Pete,
the Wood-effect was first reported in 1910 by a guy named Wood when
shooting with a filter of 720nm. The effect is caused by the structure of
the chlorophyll containing leafs, which absorb most radiation below
infrared. Only green gets (mostly) emitted after beeing reflected in the
parenchym layer of the leaf. Wavelengths above 680nm are reflected there
with no absorbtion at all thus producing the nice light spots on the IR
film.

Crazy game of chance, carrying chlorophyll "energy converters" is one of
the most typical features of living wood...

Jesko

>I think that the capital W is important.  I have always assumed that the
>effect was first noticed and/or published by someone named Wood.  Any
>comments?
>
>Pete Schermerhorn, in the glorious Berkshire hills of western Massachusetts
Yes, still the one and only!
Neue Adresse! Die alte geht noch, Ihr braucht aber den PGP Schluessel fuer
<jesko-henning@xxxxxxxxxxx> auf ldap://certserver.pgp.com.
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